Microscope.



.PAI'ENTED DEC. 10, 1907:" Y

E. BAUSGH.

MICROSCOPE. APPLIOATION FILE-D APR. 25, 1907.

ZSHEETS-SHEHT 1.

' @svwanl oz I attuned E. BAUSGH.

PATENTED DEC. 10, 1907.

MICROSCOPE. APPLICATION FILED 11.25, 1907.

2 SHEETS-$11331 2.

In 22 i; :l a=- n H' 19 F ii I:

15' it 5 6' |v i 11 F r".

wituzooeo UNITED STATES PATENT OFFICE.

EDWARD BAUSCH, OF ROCHESTER, NEW YORK, ASSIGNOR TO BAUSCH & LOMB OPTICAL COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.

mcnoscorn.

Application filed April 25. 1907. Serial No. 3707199.

To all whom'it may concern:

Be it known that I, EDWARD BAUSCH, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Microsco es and I do hereby declare the following to e a full, clear, and exact description of the same, reference being had to the accom panying drawings, forming a part of the specification, and to the reference-numerals marked thereon.

This invention relates to microscopes and more particularly to that type in which there is provided a coarse adjusting mechanism and a fine adjusting mechanism,

Accurate microscopes are very expensiv and one of the causes for this is, that heretofore the guide faces for the fine adjustment and the guide faces for the coarse adjustment have been separate; and, as these guide faces have to be true to a very small fraction of an inch, the making of the two sets of guide faces requires a great deal of labor.

The object of this invention, therefore, is to provide a slide having a guide face common both to the fine adjusting mechanism and. to the coarse adjusting mechanism, whereby a saving of labor is obtained and the cost of manufacture of the instrument is reduced.

A further object is to provide means which will hold aslide against its cooperating guiding faces under yielding pressure, thus preventing undue movement of the slide and securing greater accuracy in the instrument.

With these and other objects in view, the invention consists of the parts and combinations of parts shown in the accompanying drawin s, hereinafter described, and more partic arly pointed out in the appended claims.

In the drawings: Figure 1 is a side elevation of a projection apparatus, employing a p o'ection microscope made in accordance wit this invention. Fi 2 is a vertical sec-. tion through the optica axis of the microscope, and those parts of the projection apparatus to which the microscope is secured.

ig. 3 is a bottom view of the microscope with parts broken away. Fig.. 4 is a transverse vertical section on the line 44 of Fig. 2. Fig. 5 is a like section on the line 5-5 of Fig. 2, and Fig. 6 is a like section on the line 6-6 of F' 2. 7

While tie invention is herein shown and Specification of Letters Patent.

pressure devices 8 which are Patented Dec. 10, 1907.

described as used in rojection apparatus, it i is to be understood t iat with slight changes it may be adapted for any other purpose for which microsco es are used.

With particu ar reference to the drawing, A indicates the optical bench of a suitable projection a paratus, B the illuminator, C the lens com cnsing system, D the extensible bellows, and E the sub-stage having the usual stage F at its outer end.

Depending from the stage is a suitable support referably comprising a depending arm 1 an a housing 2 projecting forwardly from the arm. This housing is formed with a pair of guide faces 3 and 4 arranged at an angle to each other and parallel to the optical axis of the apparatus, a removable Wall 5 being provide to permit a slide 6 to be fitted within the housing 2 with the guide faces 7 and 8 of the slide in engagement with the guide faces- 3 and 4 of the housing. The guide faces 7 and 8 are arranged at the same angle as the guide faces 3 and 4 of the housing and arepressed against said faces 3 and 4 by yielding referably in the form of leaf springs secure in the housing as, for instance, by the screws 9, the latter serving also to. secure the removable wall'5.

To provide for the coarse adjustment of the nncroscope, the housing 2 also carries a manually operable gear wheel 10 which has its axis arranged transversely of the direction of movement of the slide, and which forms part of a coarse adjusting mechanism comprising also a rack 11 secured to the slide in-any suitable manner, as by screws 12; said rack having at its forward end, if desired, a lug 13 which engages the housing and limits the movement of the slide toward the stage.

Supported upon the outer end of-the slide is a microscope mounting which preferably comprises an upright 14 and a housing 15. The upright 14 carries at its upper end a suitable microscope 1'6 and has the housing 15 projecting forwardly therefrom. For fine adjustment, this housing 15 cooperateswith the same guide faces of the slide as does thesupport, and like the housing on the support, is provided with a pair of guide faces 17 and 18 arranged at an angle to each other, parallel with the optical axis of the apparatus and in alinement with the guide faces on the support. This housing also has a removable wall 19 which carries a yielding pressure device 20 in the form of a sprmg pressmg the guiding faces of the slide 6 against the guiding faces of the housing 15.

The microscope mounting is pressed in one direction, as for instance, toward the stage, by means of a helical s ring 20 which is mounted in a longitudina pocket or bore 21 in the freeend of the slide, said pocket being closed at its outer end by a screw pll ug 22 and having a lateral opening 23. T ough this latera opening projects an abutment 24in the form of a bolt carried by the housing. To obtain a fine adjustment there is provided an adjusting screw 25 ha its axis parallel to the longitudinal axis 0 the slide and mounted in the front end wall of the housing to bear, through the medium ofpa pin 26, against the sprmg abutment plug 22 before mentioned; This ad'usting screw or device 25 is provided with a linger piece which when turned in one direction causes the microscope to move away from the stage and when turnedin the other direction causes the microscope to move toward the stage, the

spring 20 in one instance being compressed and in the other-instance expanding.

I claim as my invention:

1. In a microscope, a suitable support, a microscope mounting, a slide having a guiding face common to the sup ort and to the microscope mounting, and a e and coarse adjusting mechanisms controlling the] adjustment of the parts.

2. In a microscope, 'a support, a slide adjustable longitudinally in the support, coarse adjusting mechanism for moving the slide, a microscope mounting adjustable longitudinally of the slide, and a fine adjusting mechanism for moving the microscope mounting. I

3. In a microscope, a suitable support, a slide adjustable longitudinally in the support, coarse adjusting mechanism for t e slide, a microscope mounting adjustable on the slide, and a screw for fine adjustment, carried by the microscope mounting.

4. In a microscope, a suitable support having a pair of guide faces arranged at an angle to each other, a suitable microscope mounting having a pair of guide faces also arranged at an ang e to each other, and a slide havmg a pair'of, guide faces arranged at an angle to each" other and cooperating with the guide faces on both the support and the mounting.

5. In a microscope, a suitable support, a

gaged by the gear wheel.

slide guided on the support, a microscope mounting guided on the slide and having its guiding faces alined with the guiding faces on the support, and fine and rough adjusting mechanisms, one for controlling the movement of the slide on the support and the other 'for controlling the movement of the microscope mounting on the slide.

6. In a microscope, a part having a pair of guide faces arranged at an angle to each other, a slide having guiding faces cooperating with said guide faces on said part, and a yielding pressure device-holding the slide firmly against the guide faces of said part.

7. In a microscope, a housing having a pair of guide faces arranged at an angle to each other and a removab e wall, and a slide having guide faces cooperatin with the guide. faces in the hous' and eld tosaid guide faces by the remova le wall.

'8. In a microscope, a housing having a pair of guide faces arran ed at an angle to each other and a removab e wall, a slide hav- 1.

guide faces cooperatin with the guide faces on the slide, and a yie ding pressure device holding the slide against the guide faces of the housing and held in the housing by the removable wall.

9. In a microscope, a housing having a pair of guide faces arranged at an angle to each other and a removab e wall, a slide having guide faces cooperating with the guide faces in the housing and a sprin arranged between the removable wall and t e slide.

10. In a microscope, a slide having a pocket near one end providedwith a lateral outlet, a spring arranged in the pocket, a

microsco e mounting 'ded on the outer side of t e slide and projecting through the lateral outlet and pressed by the spring and a fine adjusting screw carried b the housingand engaging the end of the s de. I p

11. In a microscope, the combination with a housing having a pair of guide faces arranged at an angle to each other and a removable wall, of a slide having guide faces mg and held to said guide faces by the reaving' an abutment cooperating with the guide faces in the hous-' movable wall, a gear wheel carried b the removable wall, and a rack on the. sli e 'en EDWARD BAUSCH. Witnesses C. M. WAGNER, W. G. Woonwon'rn. 

